An ion with a charge of +3.2×10−19 C is in region where a uniform electric field of 5×104 V/m is perpendicular to a uniform magnetic field of 0.8 T. If its acceleration is zero then its speed must be: 0 m/s 1.6×10−5 m/s 4.0×105 m/s 6.3×104 m/s any value but 0 m/s

An ion with a charge of +3.2×10−19 C is in region where a uniform electric field of 5×104 V/m is perpendicular to a uniform magnetic field of 0.8 T. If its acceleration is zero then its speed must be: 0 m/s 1.6×10−5 m/s 4.0×105 m/s 6.3×104 m/s any value but 0 m/s

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An ion with a charge of + 3.2 × 10 19 C is in region where a uniform electric field of 5 × 10 4 V / m is perpendicular to a uniform magnetic field of 0.8 T . If its acceleration is zero then its speed must be: 0 m / s 1.6 × 10 5 m / s 4.0 × 10 5 m / s 6.3 × 10 4 m / s any value but 0 m / s

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